Sandy and Caleb team up to confront Kirsten about her recent drinking problem. Ryan, determined to find out what happened between Trey and Marissa, heads to Chino for answers. Summer decides to not let Zach and Seth fighting over her ruin her prom, and forces the boys to choose who will escort her to the dance. Meanwhile, Julie and Caleb celebrate their final evening together before the divorce is finalized.

Kirsten:(to Caleb) I may like Chardonay, but I am not gonna die alone and that's more than I can say for you!

Ryan: What time is it?Seth: It's 5:30 ... ish.Ryan: You're showing up earlier and earlier.Seth: Yeah, well, we had a lot of ground to cover, so I figured, since we're both up, we may as well get a jump on it.

Seth: ... Comedy is just tragedy plus time.

Summer: The dream involved a hot guy in a tux with a carnation pinned to his lapel. Instead I’m drawing straws between Nerdboy and Assclown.

Summer:(about Ryan) Sick? Too sick to take you to the prom? He better be real sick - like dead - or I'm going to strangle him with his own wifebeater.

Episode Goofs

Julie attempts to poison Caleb by opening up his Ambien sleeping pill capsules and pouring the powder inside into his drink. However, the prescription sleep aid Ambien is only available in tablet form.

When Zach and Seth are talking in the hallway, the same guy walks by them 5 times.

When Ryan and Theresa are walking together, they walk by the same car twice.

Cultural References

Episode Title: The O.Sea

The episode title is an obvious reference to the series title, The O.C.